Electrical stopping device



A. H. SAWTELL. ELECTRICAL STOPPING- DEVICE.

APPLICATION mmuov. 7. 1919. 1,372,556.

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mlm||| A. H. SAWTELL.

ELECTRICAL STOPPING DEVICE.

APPLICATION FILED NOV. 7, I919.

1,372,556, Patented Mar. 22, 1921.

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INV'ENTOR QM BY ATTORNEY T all whom it may concern UNITED STATES PATENT,OFFICE.

ALBERTH. sawrnm, or rnovinnncn, nnonnismmni ELnc'rnIcA strorrmcnnv cn.

Be it known that I, ALBERT I-I. SAWTELL, a citizen of the United States,residing. at Providence, in the county of Providence and State of .RhodeIsland, have invented certain new andnseful Improvements in ElectricalStopping Devices, of which the following is a specification.

My invention relates to electric stopping devices for a member. windingthreads or filaments; I

The essential objects ofcmy invention are, adaptability for embodimentin a ball governing device for the delivery of threads or filamentsfromjrotary members, such as spindles; to stop delivery instantaneously;and to attain this action by means which lightly contacts with thefilaments, whereby my device may be utilized notfonly for ordinarythreads,but for infinitesimal .filaments, such as silk, which are toodelicate to be capable of supporting the weight and withstanding theabrasion of gravity drop wires. Further objects ofmy invention willappear from an examination of the draw ings and thefollowingdescription.

My invention consists, therefore, i in the means and mechanism forattaining the objects and producing theresults above specified andsuggested, substantially as herein after claimed. 1 i i i In thedrawingsillustrating the principles of thisinvention and one mode ofapplying those principles, and which drawings constitute a part of thisspecificatiom:

Figure 1 is a front elevation of a ball governor delivery deviceembodying my invention, f I i Fig. 2 acentral vertical section,partially in side elevation, of the same,

mechanism effected; by the operation of my cops," and the like togetherwith their respective guides and controllers.

on the rail 7 isva metalblock orbody 8 in- Mounted tegral with a base 10having1a channel 11 to receive the rail, and carrying a clamping Specifcation or Letterslatent. Patented Mar. 22, 1921. Application filedNovember 7,1919. serial No. 236,290.

of thebody,and a passage 18 in alinement therewith extends from the seatto the front face of the body. In thelatter is an eyelet19. A filament20 from a spindle ex- I tends through the passages and eyelet, andbeneath the ball16 which exerts the proper tension forcontrollingdeliveryof the fila ment to the winding element. Beside the eyelet onthefront of the body is a loop guide eye 22 through which the filamentpasses to the. winding element. The lower portion of the body isretracted as at 23 and has a transverse bore 24c fast in which isasleeve25 of insulating material which has threaded engagement with a screw27projecting beyond thefaces of the body and having a head 28 upon itsforward end. Uponuits rear endare clamping nuts 30 and 31 bearingagainst a flange .32 on the insulating sleeve. In thefront face of thebody abovethe passagelS, and, in this instance,slightlyto one side of avertical line passing through the latter, is a screw 34: projecting fromthe .face of the body and having a head 35. .A swingingarmfi? of lightwire, has at itsupper end an: integral loop :or coil '38 looselysurrounding the screw or'pin 34.. The Wire ofthe coil is continued inthis instance to form an arm 39 disposed at an angle to the arm 18 andin this instance terminatesin a loop lO. The arm 37is'ofsufiicient.length to contact with themember 27 when swinging in anarc. Normally it is supported by the. filament 20; in the position shownin broken linesin Fig. 1, but ifthe filament should break the arm wouldswing intoengagementwith the member 27. While the device is operative intheabsence of thearm 39 and loop LO/the device is much more effective bythe presence as these act asa counterbalance and insures against the arm37 rebounding when it first strikesthe member 27. 1 I j 1 Thearm 37makes and breaks an electric circuit whichkcontrols the operation of thewinding member. g The latter may be any convenient rotary member such asa spool, reel, or beam, andsuch member may be supported, driven,started, or stopped by any preferred structure or mechanism. In theconstruction illustrated in Fig. 4 the winding member is a reel 42 faston a shaft 43 ournaled in supports 45 upon a base 46. eripheral teeth.48 on the reel engage a gear 49 fast to a driving shaft 50 alsojournaled in the supports. The shaft 50 is driven by a motor or belt. Inthis case a driving wheel 51 on the shaft is adapted to receive a beltfor driving purposes. Rigid with, pinion 49 is one member 58 of afriction clutch whose cone element 54 is upon a sleeve 55 slidable onthe shaft 50. A hand lever 57 is pivoted at its lower end upon a pin58in a projecting portion 59 of the base, and engages the sleeve 55 bymeans of a .pin'fiO in the latter slidable in a slot 61 in the lever. Aspring 63 engages at one end the lever 57, and at its other end a pin 65in the base, and tends to draw the lever and cone from and out ofengagement with the fast members 53 of the clutch and thus stop therotation of the-winding member 42. An upturned finger 67 011 the lever57 engages a downwardly projecting portion 69 of an armature '70 pivotedat'itseopposite end to a plate or bracket 72 fast to one of thesupports. Attached to'the bracket is the magnet 74 of the armature whichwhen emerged elevates the member and releases the starting and stoppinglever 57. The magnet and armature are in a circuit controlled by the arm37. 7 It has been found advantageous, but not imperative, to employ twoelectric circuits rather than one, since 'a current S0 strong as to mosteffectively operate the armature 70, is sometimes so excesslve astooverheat the arm 37. To ob- .viaterthis danger two circuits may beemployed, When soemployed a second magnet 76 is mountedfor instance onthe bracket 72 having its-armature 77 pivoted as at 78 to the plate, andcarrying onsaid end an arm 79 having contact members 80 adapted toengage contactmembers 82 in an insulating block 83 on the plate 72, oneof which is on 'a'circuit wire 84 e'Xtending'to a battery '85, and theother on a wire 86 extending to the magnet" 74. A wire 87 from thebattery to the 'magnet 74 completes this circuit.

The magnet or translator'76 is in .circuit 1 and a wire 92 extendingfrom the relay'and 55 nuts 30 and 31 in electrical contact with themember 27. This 'circuit is completed,

clamped at its'g'opposite end between the when the arm'37 engagesthemember 27, by the base .10, body 8, and member 34. 7

'It'will 'be observed that the circuit last described which immediatelyincludes the governor is the first to operate, and that the member 76-may be employed as an operating magnet rather than as a relay, if it isdesired to omit the auxiliary circuit first described containing themagnet 7 4.

No claim is made herein per 86 to the tension device herein disclosed,the same being shown, described and claimed in my copending applicationSerial No. 367,471.

claim 1. In a device of the character described, an electric circuit, ametallic governor body in the circuit, a pivot member in the bodyconstituting one circuit terminal, a stop member in the bodyconstituting the other terminal of the circuit, said body being providedwith a thread delivery passage adjacent the terminals, and a metallicarm normally pendent and loosely pivotally mounted on the pivot memberresting lightly against the filament and movable by gravity into directcontact with the stop member to close the circuit.

2. In'a device of the character described,

an electric circuit, a metallic governor body in the circuit, a pivotmember in the body constituting one circuit terminal, a stop member inthe body and insulated from said body constituting the other terminal ofthe circuit, said body being provided with a thread delivery passageintermediate said members, and a metallic arm normally pendent andloosely pivotally mounted on the pivot member resting lightly againstthe filament movable by gravity transversely of the passage into directengagement with the stop member to close the circuit.

3. In a device of the character described, an electric circuit, ametallic governor body in the circuit provided with a transverse passagefor deliveryof a thread, a pivot member in the body above the passageconstituting one terminal of the circuit, a stop member in the bodybelow the passage constituting the other terminal of the circuit, aguide in the body at one side of the passage adapted to receive thethread, and a metallic balance arm normally pendent and looselypivotally mounted on the pivot member resting against the filament andsupported by the thread intermediate the passage and guide and movableby a release from the thread into direct contact with the stop member toclose the circuit.

4. In a device of the character described, an electric circuit, ametallic governor body in the circuit provided with a transverse passagefor delivery of a thread, and with a vertical hole terminating in asemispherical seat in an intermediate portion of the passage, a ball inthe seat adapted to rest on the thread, a thread guide on thebodyadjacent the passage, a pivot member in the body above and at one sideof the passage, a stop member below the passage, said membersconstituting the terminals of the circuit, and an arm normally pendentand loosely mounted on the pivot member adapted to rest lightly againstand be supported by the thread and movable when released by the threadto gravitate into direct contact with the stop member to close thecircuit.

5. In a device of the character described, an electric circuit, ametallic governor body in the circuit, a pivot member in the bodyconstituting one terminal of the circuit, a stop member in the bodyconstituting the other terminal of the circuit, said body being providedwith a thread delivery passage adjacentthe terminals, a gravitatingmetallic arm normally pendent and loosely mounted on the pivot memberadapted to directly engage the stop member resting lightly against thefilament and released by breaking of such filament and to close thecircuit, and a counterweight on the arm.

6. An electrically operated stop motion for winding machines comprisingan electrical governor body provided witha passage for a thread, a pivotmember on the body above the passage constituting one circuit terminal,a stop member in the body below the passage constitutlng the othercircuit terminal, an arm normally pendent and loosely pivotally mountedon the pivot member normally resting lightly against and suspended bythe thread and movable when released to gravitate and directly engagethe stop member and close the circuit, a rotary winding member fordrawing the thread through the passage, a stop lever controlling thewinding member, a magnet armature also in circuit, and an armatureoperated by the magnet detachably enga 'ng the leverland disengageableby the closmg of the circuit.

7. An electrically operated stop motion for winding machines comprisinga governor body provided with a passage for a thread and constituting apart of an electrical circuit, a pivot member on the body adjacent thepassage constituting a circuit terminal,

a stop member on the body adjacent the passage constituting anotherterminal of the circuit, a counter balanced and normally pendent andloosely pivotally mounted on the pivot member normally resting lightly,

against and suspended by the thread and adapted to gravitate anddirectly contact with the stop member to close the circuit when releasedby the thread, a battery in the circuit, a rotary winding member fordrawing the thread through the passage, a stop lever controlling thewinding member, a second electrical circuit controlled by thetranslator, a battery in the second circuit of greater strength than thefirst batter a magnet also in the second circuit, an an armatureoperated by the magnet detachably engaging the lever and actuated by theclosing of the circuit.

8. In a device of the character specified, a

pivoted member adapted to normally rest lightly against a filament, astop mechanism, embodying electrical connections including a memberagainst which said pivoted member drops into direct contact when thefilament is broken, said loosely pivoted member having a portionextended beyond its pivot to serve as a counterweight and to preventrebounding of said member when it strikes said electrically connectedmember.

9. In adevice of the character specified, a pivoted member having a coilloosely embracing a support therefor and normally supported by restinglightly upon a filament, a stop mechanism embodying electricalconnections including a member against which said pivoted member dropsand directly engages when the filament is broken, said coil beingprovided with an integral extension beyond its pivot and looped to forma counterweight.

In .testimony whereof I have affixed my signature.

ALBERT H. SAWTELL.

